/*
 * Tencent is pleased to support the open source community by making Angel available.
 *
 * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in 
 * compliance with the License. You may obtain a copy of the License at
 *
 * https://opensource.org/licenses/Apache-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 *
 */


package com.tencent.angel.localcluster;

import com.tencent.angel.common.location.Location;
import com.tencent.angel.ps.PSAttemptId;
import com.tencent.angel.ps.ParameterServer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;

/**
 * Local Angel PS. It startups the {@link ParameterServer} using a thread.
 */
public class LocalPS extends Thread {
  private static final Log LOG = LogFactory.getLog(LocalPS.class);
  /**
   * ps
   */
  private final ParameterServer ps;

  /**
   * Create a local ps
   *
   * @param psAttemptId    ps attempt id
   * @param masterLocation master location
   * @param conf           cluster configuration
   */
  public LocalPS(PSAttemptId psAttemptId, Location masterLocation, Configuration conf) {
    ps = new ParameterServer(psAttemptId.getPsId().getIndex(), psAttemptId.getIndex(),
      masterLocation.getIp(), masterLocation.getPort(), conf);
  }

  @Override public void run() {
    try {
      ps.initialize();
      ps.start();
    } catch (Exception e) {
      LOG.fatal("ps " + ps.getPSAttemptId() + " start failed.", e);
      ps.failed(e.getMessage());
    }
  }

  /**
   * Get ps
   *
   * @return ps
   */
  public ParameterServer getPS() {
    return ps;
  }

  /**
   * Exit
   */
  public void exit() {
    ps.stop(0);
    interrupt();
  }
}
